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Message
Why is time important to change motor oil?
Posted on 7/22/21 at 2:20 pm
Posted on 7/22/21 at 2:20 pm
I understand the need depends on mileage, but why every year?
30
Posted on 7/22/21 at 2:20 pm to Cycledude
Probably some sort of oxidization or similar
This post was edited on 7/22/21 at 2:21 pm
Posted on 7/22/21 at 2:21 pm to Cycledude
Engine oil breaks down and gels over time.
Posted on 7/22/21 at 2:21 pm to Cycledude
Wow.... 
Posted on 7/22/21 at 2:22 pm to Cycledude
quote:
every year?
Posted on 7/22/21 at 2:22 pm to Cycledude
Modern oils are not nearly as unstable as previous ones. If you use a decent product, as long as you're not going over a couple years, you're fine.
But seriously just drop it every year even if you're not hitting the mileage requirement. The ROI just isn't there to push the limits on a car you drive that little.
But seriously just drop it every year even if you're not hitting the mileage requirement. The ROI just isn't there to push the limits on a car you drive that little.
This post was edited on 7/22/21 at 2:26 pm
Posted on 7/22/21 at 2:25 pm to fightin tigers
quote:
Probably some sort of oxidization or similar
This is the answer. Where ever there is oxygen, oxidation will occur and your motor oil will break down. This is why tires have a shelf life of 6 years regardless of mileage.
Posted on 7/22/21 at 2:27 pm to Cycledude
I thought that "they" said every 3 months (or 3,000 miles), which is BS. I guess it's changed to 1 year for high mileage synthetics.
The oil probably breaks down over time. I don't consider the time elapsed when it comes to oil changes, only the mileage since the last one, since I drive enough that it needs to be changed before time would be a factor.
If you have a car that isn't driven frequently, then I can see why it would need to be taken into consideration.
The oil probably breaks down over time. I don't consider the time elapsed when it comes to oil changes, only the mileage since the last one, since I drive enough that it needs to be changed before time would be a factor.
If you have a car that isn't driven frequently, then I can see why it would need to be taken into consideration.
Posted on 7/22/21 at 2:28 pm to Cycledude
quote:
I understand the need depends on mileage, but why every year?
Humidity and fuel dilution.
Modern engines are too well sealed up. Crankcase pressure is rerouted into intakes rather than venting. This leads to a build up of moisture if not frequently run to operating temp.
A lot of cold starts leads to a lot of fuel in the oil.
Fuel is a solvent.
Posted on 7/22/21 at 2:33 pm to Cycledude
quote:Because the folks selling you oil made that rule.
Why is time important to change motor oil?
Posted on 7/22/21 at 2:36 pm to X123F45
As a young punk a wise old man once told me he changed his oil every 12,0000 miles. Told him he was crazy. I had bought into the "change every 3,000 mile" mantra. I still go every 7,500 tho.
Posted on 7/22/21 at 2:37 pm to Jor Jor The Dinosaur
quote:
I thought that "they" said every 3 months (or 3,000 miles), which is BS. I guess it's changed to 1 year for high mileage synthetics.
3 month, 3000 miles harkens back to the days of carbureted engines and really doesn't apply anymore. Depending on the driving you to, and the engine you have 5000 to 7500 should be fine for most vehicles and 6 months for conventional, a year for full synthetic.
Posted on 7/22/21 at 2:40 pm to kjp811
quote:
Depending on the driving you to, and the engine you have 5000 to 7500 should be fine for most vehicles and 6 months for conventional, a year for full synthetic.
Yep. All of our Toyotas, whenever you do the reset of the alert, it is 5k miles until the next one.
Posted on 7/22/21 at 2:41 pm to Cycledude
I put ~1000 miles a year on a car and get it changed annually. Only because the manufacturer recommends it and the used car buyers will run if you don't have good service records
Posted on 7/22/21 at 2:41 pm to Cycledude
quote:
Cycledude
Yeah, okay. Hand the phone back to your husband.
Pics?
Posted on 7/22/21 at 2:42 pm to Cycledude
Posted on 7/22/21 at 2:42 pm to Cycledude
I change mine every 3 months. That's only about 1,500 miles, typically. Been thinking about increasing the interval but I guess I'd rather be safe.
Posted on 7/22/21 at 2:44 pm to TheAlmightySmash
quote:
I put ~1000 miles a year on a car and get it changed annually
I do this on mine as well, also because it drinks a steady diet of ethanol that tends to pollute the oil a little more than gasoline. I typically end up under it a couple times a year fixing something I broke, so I'll just do it then. I'm not a stickler for keeping track because it hardly ever gets driven.
Posted on 7/22/21 at 2:46 pm to USMEagles
quote:
I change mine every 3 months. That's only about 1,500 miles, typically. Been thinking about increasing the interval but I guess I'd rather be safe.
You have a better chance of having an engine failure due to the oil change people screwing up than you do from the oil going bad. The more you screw with it, the more chances you have for someone to mess up.
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